C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Question for Pete k

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Old Jan 24, 2007 | 11:45 AM
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This is an easy one for you.
I have a small leak drip,drip at the yoke seal in the tailshaft.
I have the fsm can the new seal be installed without the GM tool
P/N J21426. Once again thank's for all the help you give us here.
Steve
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Old Jan 24, 2007 | 11:56 AM
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Pete K
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Yes it can.
However, the tailshaft seal often leaks because the bushing is severely worn. I would suggest you remove the driveshaft and pull the 4 bolts that hold the tailhousing to the trans. Before removing it, I would suggest pulliung the seal while the taillhousing is still bolted on. I usually put a chisel between the seal and the housing and gently tap it in to force the seal out. Work it slow and take your time.Carry the tailhousing to the bench to allow for easier seal(and possibly bushing) replacement. I would recommend strongly changing the bushing regardless.
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Old Jan 24, 2007 | 12:24 PM
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Thanks Pete,
I would not have known about the bushing if i did not ask you.
Steve
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Old Jan 25, 2007 | 05:32 AM
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Do the above, but make sure you check the driveshaft yoke for uneven wear. If you find that it has, you will need to replace the yoke. Check to see if the wear goes all the way around the yoke fairly even. If it does, then chances are the driveshaft is not out of balance. If the wear is to one side, the driveshaft should be rebalanced. If the yoke is in good shape, polish it with 600 or finer grit in direction of rotation only. Make sure you use the 3 lip Vamac seal (it is prelubed) and the Teflon bushing, and not the babbitt or bronze. This should solve this problem for good.
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Old Jan 25, 2007 | 10:06 AM
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Have you had to keep adding oil? do you have a puddle under the car? We have an 87' with 33k miles and we see a little staining from the front seal when we check the level it is not bad, have only barely put a couple of onces in over the last 19yrs. I don't now if it is really worth all the trouble if it just some slight. It just depend's if it is really running out or low after a long drive.
wro87
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Old Jan 25, 2007 | 10:53 AM
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Yes its a small drip but this is one of my winter to do list items. Kind of **** about oil on my floor. And other things. lol
Steve
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